I assume when you did CAs that you checked or replaced sway bar bushings as well. It does sound similar to my situation as mentioned by another here. I would get a pull and a shutter on hard brake exiting highway etc.

Mine was the bushing which appeared fine visually but a pry with a bar and pressure off bar showed bushing was pretty much gone inside. Just slapping metal on one side.

I'm sure there are other causes but I'm not familiar with what they may be.